I have a Dell Precision T5400 desktop running windows 7 64 bit with a 128GB solid state drive for windows and main operating systems for fast boot up and a second sata II 500GB drive for storage, etc. This keeps my computer running fast, especially since it has dual quad core processors and 32GB of ram. The problem is that the mouse will sometimes freeze up and I can hear the little jingle that is played when an unknown usb device is plugged in and not recognized but I installed all the updated drivers when I installed windows. It is not the mouse since I have used several different ones, a few brand new and a few that I had for other computers. This problem is extremely aggravating and I am also afraid I could totally lose mouse capability. Could anyone please help me and tell me what to do to fix this problem. It is not the usb port on the computer, I have swapped out several different ones and the one I use at present; I could unplug the mouse and plug in a flash drive or any other usb device and it works fine. Please, I need help.